Grain-riddle



(No Model.)

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GRAIN RIDDLE.

Patented Oct. 28, 1884.

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* UNITED STATES PATENT QFFICE.

HIRAM ELLIS, OF POTTSTOXVN, PENNSYLVANIA.

GRAIN-RIDDLE.

SPECIFICATION forming part of Letters Patent No. 307,277, dated October 28, 1884.

Application filed May To all whom, it may concern;

Be it known that I, HIRAM ELLIs, a citizen of the United States, and a residentof Potts town,l\ Iontgomery county,Pennsylvania, have invented certain Improvements in Grain-Riddles, of which the following is a specification. The object of my invention is to so construct the bars of a grain-riddle for t-lirashingmachines or separators that a mass or layer of grain will be maintained on the bar, and thus prevent the rebounding of other grain which falls onto the same.

In the accompanying drawings, Figure l is a longitudinal section of sufficient of a thrashing-machine to illustrate my invention; Fig. 2, ail-enlarged sectional view of the riddle; Fig. 3, a plan view of the same, and Figs. 4 and views of modified forms of the riddle. 1 In Fig. l, A represents the shaking table of i a thrashing-machine; B, the grain-bottom; D, the blastfan; F, the blast-spout; G, the riddle; 1 ii. the bottom screen of the same; i, the grainspout, and J the tailingspout, all ofthese parts being arranged as is usual in thrashing-niachines, and the riddle having a longitudinal shaking movement imparted to it by a crank on a shaft, a', driven from the fiy-wheel shaft, as shown, or in any other suitable manner.

The feature ofmyinvention is illustrated in Fig. 2, on reference to which it will be seen that the transverse bars a of that portion of the riddle which is adjacent to the deliverymouth I) of the grain-bottom are each recessed so as to form a pocket, (I, terminating in are taining-rib, f, at the front or discharge end of the bar. By this means a mass or layer of grain is always maintained on the top of the bar to form a cushion for the stream of grain flowing from the grain-bottom onto the riddle, so that the fresh grain does not rebound, but is at once brought under the action of the riddie and fed forward over the same. The grain 5. $84. (No niodchi which passes over the retaining-rib strikes the inclined rear edge of the bar in advance, and is deflected through thespace 9 between the bars and onto the screen H beneath the riddle, the chaff passing over the top of the riddle, and as it passes each opening 9 being subjected to the action of the blast from the fan I), which effects the separation of the chaff from the grain. There is a further separation by the screen H, the grain bci ng passed through the spout I, and the tailings through the spout J. The bars a at the rear or delivery end of the screen are plain, as there is not at this point any necessity for the retaining-ribs, the grain being screened off. and it being desirable to discharge the chaff as readily as possi.

ble.

My improved riddle may be made of sheet metal as well as wood, instances of such sheetmetal riddles being shown in Figs. 4. and 5.

While it is preferable that the rear end of the bar should be as high as the top of the rib f, the results of my invention may in a measure be attained even when the top of the bar is flat, as in Fig. 5, the ribj" serving to retain on the bar sufficient grain to form a cushion, as described above.

I claim as my invention? 1. A grairrriddle having bars with retainingifibsf at the front or discharge ends of the bars, as set forth.

2. Agraiu riddle having bars with pockets d terminating in retaining-ribs f at the front or discharge ends of the bars, as set forth.

I u testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

HIRAM ELLIS.

\Vitncsses:

JACOB H. Gnnrny, \V. M. HOBART. 

